| 摘要 |
PURPOSE:To avoid noise input through an earth system by receiving a receiving signal through a matching transformer and connecting it to the same point at the secondary of the matching transformer. CONSTITUTION:A device 1 connected to a device (n) having a noise source n-1 and devices 4, 2 connected to a device 3 having a noise source 3-1 are provided respectively with the matching transformers 1-3, 2-3 and 4-3, and a signal from the devices (n) and 3 is received via the matching transformers 1-3, 2-3 and 4-3. In this case, the matching transformers 1-3, 2-3 and 4-3 are matched respectively with transmission side devices n, 3 so as to operate as band pass filters and to cut off unnecessary noise. Thus, the devices 1, 2, 4 at receiving side are operated independently of noise. |
